Data / Rankings / Population aged 18 to 64 / Counties in South Dakota

Counties in South Dakota by population aged 18 to 64

Clay County had the highest population aged 18 to 64 of 66 counties in 2017, at 70.4%. Jerauld County had the lowest, at 48.6%. The median was 55.3% and the figure for South Dakota was 59%. Source: the U.S. Census Bureau.

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Highest70.4Clay County
Lowest48.6Jerauld County
Median55.366 counties
South Dakota59History

Map of counties, 2017

Aurora County: 52.5 %Beadle County: 56 %Bennett County: 54.2 %Bon Homme County: 60.3 %Brookings County: 67.6 %Brown County: 59.4 %Brule County: 55.5 %Buffalo County: 52.2 %Butte County: 56.4 %Campbell County: 56.2 %Charles Mix County: 53.4 %Clark County: 53.9 %Clay County: 70.4 %Codington County: 59 %Corson County: 53.3 %Custer County: 53.9 %Davison County: 59.1 %Day County: 52.3 %Deuel County: 55.6 %Dewey County: 56.7 %Douglas County: 51 %Edmunds County: 55.3 %Fall River County: 52.9 %Faulk County: 53.1 %Grant County: 55.6 %Gregory County: 52 %Haakon County: 53.7 %Hamlin County: 51.4 %Hand County: 53.5 %Hanson County: 53.3 %Harding County: 59.1 %Hughes County: 59.7 %Hutchinson County: 52.1 %Hyde County: 55 %Jackson County: 54.1 %Jerauld County: 48.6 %Jones County: 55.9 %Kingsbury County: 54.4 %Lake County: 60.4 %Lawrence County: 60.1 %Lincoln County: 59.3 %Lyman County: 55.3 %McCook County: 54.9 %McPherson County: 50.8 %Marshall County: 55.8 %Meade County: 59.9 %Mellette County: 52.5 %Miner County: 54.1 %Minnehaha County: 61.4 %Moody County: 55.3 %Oglala Lakota County: 55.3 %Pennington County: 60.2 %Perkins County: 54.4 %Potter County: 50.2 %Roberts County: 52.7 %Sanborn County: 55.6 %Spink County: 56.6 %Stanley County: 56 %Sully County: 57.6 %Todd County: 51.6 %Tripp County: 55.3 %Turner County: 55.1 %Union County: 57.5 %Walworth County: 53.4 %Yankton County: 60 %Ziebach County: 55.6 %
  • Under 52
  • 52 to 54
  • 54 to 55
  • 55 to 56
  • 56 to 59
  • 59 and over
%, 2017. Source: Invokely calculation with data from U.S. Census Bureau. Boundaries: U.S. Census Bureau cartographic boundary files.

Top 40 counties, 2017

Clay County: 70.4 %Clay County70.4Brookings County: 67.6 %Brookings County67.6Minnehaha County: 61.4 %Minnehaha County61.4Lake County: 60.4 %Lake County60.4Bon Homme County: 60.3 %Bon Homme County60.3Pennington County: 60.2 %Pennington County60.2Lawrence County: 60.1 %Lawrence County60.1Yankton County: 60 %Yankton County60Meade County: 59.9 %Meade County59.9Hughes County: 59.7 %Hughes County59.7Brown County: 59.4 %Brown County59.4Lincoln County: 59.3 %Lincoln County59.3Harding County: 59.1 %Harding County59.1Davison County: 59.1 %Davison County59.1Codington County: 59 %Codington County59Sully County: 57.6 %Sully County57.6Union County: 57.5 %Union County57.5Dewey County: 56.7 %Dewey County56.7Spink County: 56.6 %Spink County56.6Butte County: 56.4 %Butte County56.4Campbell County: 56.2 %Campbell County56.2Beadle County: 56 %Beadle County56Stanley County: 56 %Stanley County56Jones County: 55.9 %Jones County55.9Marshall County: 55.8 %Marshall County55.8Grant County: 55.6 %Grant County55.6Deuel County: 55.6 %Deuel County55.6Sanborn County: 55.6 %Sanborn County55.6Ziebach County: 55.6 %Ziebach County55.6Brule County: 55.5 %Brule County55.5Moody County: 55.3 %Moody County55.3Oglala Lakota County: 55.3 %Oglala Lakota County55.3Tripp County: 55.3 %Tripp County55.3Edmunds County: 55.3 %Edmunds County55.3Lyman County: 55.3 %Lyman County55.3Turner County: 55.1 %Turner County55.1Hyde County: 55 %Hyde County55McCook County: 54.9 %McCook County54.9Perkins County: 54.4 %Perkins County54.4Kingsbury County: 54.4 %Kingsbury County54.4Clay County: 70.4 %Clay County70.4Brookings County: 67.6 %Brookings County67.6Minnehaha County: 61.4 %Minnehaha County61.4Lake County: 60.4 %Lake County60.4Bon Homme County: 60.3 %Bon Homme County60.3Pennington County: 60.2 %Pennington County60.2Lawrence County: 60.1 %Lawrence County60.1Yankton County: 60 %Yankton County60Meade County: 59.9 %Meade County59.9Hughes County: 59.7 %Hughes County59.7Brown County: 59.4 %Brown County59.4Lincoln County: 59.3 %Lincoln County59.3Harding County: 59.1 %Harding County59.1Davison County: 59.1 %Davison County59.1Codington County: 59 %Codington County59Sully County: 57.6 %Sully County57.6Union County: 57.5 %Union County57.5Dewey County: 56.7 %Dewey County56.7Spink County: 56.6 %Spink County56.6Butte County: 56.4 %Butte County56.4Campbell County: 56.2 %Campbell County56.2Beadle County: 56 %Beadle County56Stanley County: 56 %Stanley County56Jones County: 55.9 %Jones County55.9Marshall County: 55.8 %Marshall County55.8Grant County: 55.6 %Grant County55.6Deuel County: 55.6 %Deuel County55.6Sanborn County: 55.6 %Sanborn County55.6Ziebach County: 55.6 %Ziebach County55.6Brule County: 55.5 %Brule County55.5Moody County: 55.3 %Moody County55.3Oglala Lakota County: 55.3 %Oglala Lakota County55.3Tripp County: 55.3 %Tripp County55.3Edmunds County: 55.3 %Edmunds County55.3Lyman County: 55.3 %Lyman County55.3Turner County: 55.1 %Turner County55.1Hyde County: 55 %Hyde County55McCook County: 54.9 %McCook County54.9Perkins County: 54.4 %Perkins County54.4Kingsbury County: 54.4 %Kingsbury County54.4
%. Source: Invokely calculation with data from U.S. Census Bureau. Retrieved 2026-10-12.

Full ranking

RankCounties2017 (%)Change on 2016
1Clay County70.4-0.3 pts
2Brookings County67.6-0.5 pts
3Minnehaha County61.4-0.4 pts
4Lake County60.4+0.1 pts
5Bon Homme County60.3-0.5 pts
6Pennington County60.2-0.3 pts
7Lawrence County60.1-0.8 pts
8Yankton County60-0.5 pts
9Meade County59.9-0.1 pts
10Hughes County59.7-0.6 pts
11Brown County59.4-0.3 pts
12Lincoln County59.3-0.2 pts
13Harding County59.1+0.4 pts
14Davison County59.1-0.2 pts
15Codington County59-0.2 pts
16Sully County57.6-0.9 pts
17Union County57.5-0.4 pts
18Dewey County56.7+0.3 pts
19Spink County56.6-0.1 pts
20Butte County56.4-0.4 pts
21Campbell County56.2-0.4 pts
22Beadle County56-0.2 pts
23Stanley County56-0.8 pts
24Jones County55.9-0.8 pts
25Marshall County55.8-0.6 pts
26Grant County55.6-0.1 pts
27Deuel County55.6-0 pts
28Sanborn County55.6-1.6 pts
29Ziebach County55.6+1.6 pts
30Brule County55.5-1 pts
31Moody County55.3-1 pts
32Oglala Lakota County55.3-0.2 pts
33Tripp County55.3+0.2 pts
34Edmunds County55.3+0.3 pts
35Lyman County55.3-0.1 pts
36Turner County55.1-0.8 pts
37Hyde County55-0.9 pts
38McCook County54.9-0.3 pts
39Perkins County54.4-0.8 pts
40Kingsbury County54.4-0.8 pts
41Bennett County54.2-0.2 pts
42Jackson County54.1-0.3 pts
43Miner County54.10 pts
44Custer County53.9-1.5 pts
45Clark County53.9-0.8 pts
46Haakon County53.7-1 pts
47Hand County53.5-0.7 pts
48Charles Mix County53.4+0.3 pts
49Walworth County53.4+0.4 pts
50Hanson County53.30 pts
51Corson County53.3-1.2 pts
52Faulk County53.1-1.1 pts
53Fall River County52.9-0.4 pts
54Roberts County52.7-0.5 pts
55Mellette County52.5+0.7 pts
56Aurora County52.5+0.3 pts
57Day County52.3+0.2 pts
58Buffalo County52.2-0.3 pts
59Hutchinson County52.1-0.5 pts
60Gregory County520 pts
61Todd County51.6-0.6 pts
62Hamlin County51.4+0.6 pts
63Douglas County51-0.7 pts
64McPherson County50.80 pts
65Potter County50.2-0 pts
66Jerauld County48.6+0.3 pts

Other periods

About this ranking

Residents aged 18 to 64 as a percentage of total population on 1 July. United States: Census Bureau county population estimates by age; states and the nation are sums of their counties.

Not comparable with working-age shares for ages 15 to 64 used in EU and World Bank statistics.

Every value in the ranking comes from the same publisher and the same period, so the counties are compared on one definition. Equal values share a rank.

How to cite

U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.

Citation styles

The publisher is the author. Invokely is named only as the place the figures were read, where a style asks for it.

APA 7

U.S. Census Bureau. (2026). Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties (Counties in South Dakota by population aged 18 to 64, 2017) [Data set]. Retrieved October 12, 2026, from https://www.census.gov/programs-surveys/popest/data/data-sets.html

MLA 9

Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in South Dakota by population aged 18 to 64, 2017. U.S. Census Bureau, 25 June 2026, https://www.census.gov/programs-surveys/popest/data/data-sets.html. Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017. Accessed 12 Oct. 2026.

Chicago (author-date)

U.S. Census Bureau. 2026. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Counties in South Dakota by population aged 18 to 64, 2017. Dataset. Accessed October 12, 2026. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Also distributed by Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017.

Harvard

U.S. Census Bureau (2026) Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties, Counties in South Dakota by population aged 18 to 64, 2017 [Dataset]. Available at: https://www.census.gov/programs-surveys/popest/data/data-sets.html, via Invokely: https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017 (Accessed: 12 October 2026).

BibTeX
@misc{census_counties_in_south_dakota_2017,
  author = {{U.S. Census Bureau}},
  title = {{Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in South Dakota by population aged 18 to 64, 2017}},
  year = {2026},
  howpublished = {Data set},
  url = {https://www.census.gov/programs-surveys/popest/data/data-sets.html},
  urldate = {2026-10-12},
  note = {Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017. Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.},
}
RIS
TY  - DATA
AU  - U.S. Census Bureau
TI  - Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties: Counties in South Dakota by population aged 18 to 64, 2017
PY  - 2026
DA  - 2026/06/25
PB  - U.S. Census Bureau
DB  - Invokely
UR  - https://www.census.gov/programs-surveys/popest/data/data-sets.html
L2  - https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017
Y2  - 2026/10/12
N1  - Accessed via Invokely, https://invokely.ai/rankings/population-18-64/south-dakota-counties?period=2017.
N1  - Publisher attribution: U.S. Census Bureau. Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. https://www.census.gov/programs-surveys/popest/data/data-sets.html. Retrieved 2026-10-12.
ER  -
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Questions

Which county has the highest population aged 18 to 64?

Clay County, with 70.4% in 2017, according to the U.S. Census Bureau.

Which county has the lowest population aged 18 to 64?

Jerauld County, with 48.6% in 2017.

Where does this ranking come from?

Every value comes from one source and one period, so the places are comparable: U.S. Census Bureau, Population Estimates Program, county population by age and sex: residents aged 18 to 64 as a percentage of the total on 1 July, 2010 to 2019 from the 2010 to 2020 intercensal file and 2020 onwards from the latest vintage; states and the nation summed from counties. Retrieved 2026-10-12.

Population aged 18 to 64: other rankings

Counties in South Dakota: more rankings